"I am so excited. I've wanted to do this for a long time," said Sadie. She, however, hasn't had any experience in dancing, saying, "I had lessons when I was 3 like every little girl does. It ended at 4. I don't remember anything of it. I'm startin' very fresh."

Tavis said of his decision to join the show, "I decided I would do one last foolish thing before I turn 50." He added that he already lost 20 pounds after he began training about seven weeks ago.

Alfonso, meanwhile, teased viewers with what they could expect from his performance. "We will absolutely give the fans what they would love to see, which is the Carlton dance," he said, referring to the dance moves he made famous on "Fresh Prince". "I've got to do the Carlton, I've got to do the 'Jump On It' and I got to do a little Michael Jackson. I gotta give the audience a reason to keep me on."

"DWTS" season 19 kicks off Monday, September 15 at 8 P.M. ET on ABC. Julianne Hough is added as a fourth judge, joining the show's vets Len Goodman, Carrie Ann Inaba and Bruno Tonioli. As another change in this installment, executive producer Rob Wade said there would be "a chance for America to have more influence over the show."